Bedside SIRS criteria assessment with sepsis pathway guidance. Enter vitals and labs — score updates live.
📋 Source: SIRS Criteria: Bone RC et al. Chest 1992. Note: Sepsis-3 (Singer M et al. JAMA 2016) replaced SIRS for sepsis diagnosis — SOFA score ≥2 now defines organ dysfunction. Your doctor or healthcare provider knows your history and circumstances — always follow their personalised advice over general information.
Clinician tool. SIRS ≥2 criteria + suspected infection = suspect sepsis. This tool is for clinical decision support — always apply senior clinical judgement and follow your facility's sepsis pathway.
SIRS criteria met
Enter values below
0/4
Criterion 1 — Temperature —
Temperature
Met if: >38.0°C or <36.0°C
°C
Criterion 2 — Heart Rate —
Heart rate
Met if: >90 bpm
bpm
Criterion 3 — Respiratory Rate —
Respiratory rate
Met if: >20 breaths/min
breaths/min
Criterion 4 — White Cell Count —
WBC (white blood cell count)
Met if: >12.0 or <4.0 ×10⁹/L, or >10% band forms
×10⁹/L
If WBC not yet available, leave blank. Tick bands if >10%:
Clinical context
Is there a known or suspected source of infection?
Required to classify SIRS as sepsis.
Also consider: qSOFA criteria (altered mentation, RR ≥22, SBP ≤100 mmHg). A qSOFA score ≥2 suggests organ dysfunction and warrants urgent review, regardless of SIRS count.
Clinical decision support only. SIRS criteria are a screening tool — they are sensitive but not specific for sepsis. Non-infectious conditions (pancreatitis, burns, trauma, surgery) can cause SIRS. Conversely, patients can have sepsis with a SIRS score <2. Always apply clinical judgement. In Australia, if sepsis is suspected, follow your facility's sepsis pathway and the Australian Sepsis Network guidelines. Do not delay antibiotics pending full results if sepsis is clinically likely.
Sources
Bone RC, Balk RA, Cerra FB, et al. Definitions for sepsis and organ failure and guidelines for the use of innovative therapies in sepsis. Chest. 1992;101(6):1644–1655. doi:10.1378/chest.101.6.1644 (Original SIRS consensus definition)
Singer M, Deutschman CS, Seymour CW, et al. The Third International Consensus Definitions for Sepsis and Septic Shock (Sepsis-3). JAMA. 2016;315(8):801–810. doi:10.1001/jama.2016.0287